6432990 has 16 divisors (see below), whose sum is σ = 15439248. Its totient is φ = 1715456.

The previous prime is 6432989. The next prime is 6432991. The reversal of 6432990 is 992346.

It is an interprime number because it is at equal distance from previous prime (6432989) and next prime (6432991).

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6432991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 107187 + ... + 107246.

It is an arithmetic number, because the mean of its divisors is an integer number (964953).

Almost surely, 2^6432990 is an apocalyptic number.

6432990 is an abundant number, since it is smaller than the sum of its proper divisors (9006258).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6432990 is a wasteful number, since it uses less digits than its factorization.

6432990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214443.

The product of its (nonzero) digits is 11664, while the sum is 33.

The square root of 6432990 is about 2536.3339685459. Note that the first 3 decimals coincide. The cubic root of 6432990 is about 185.9820193048.

The spelling of 6432990 in words is "six million, four hundred thirty-two thousand, nine hundred ninety".